specify return types.

return types, 64-bit changes: ioctl cmd -> u_long, casts, etc.

4.4BSD snapshot (revision 8.1); add 1993 to copyright

make kernel includes standard

need to include systm.h

MIN -> min, MAX -> max

FIONREAD can only return 32-bit size

close should return 0

convert to use new select interface, selrecord/selwakeup

misc cleanups

more-or-less working with new proc & user structs

update for new VM

invert sign of negative pgrp

need to include vnode.h

correct args to logioctl (was missing dev!), don't hold reference
to pgrp structure (use pgid), use read flag instead of local for non-blocking

pgsignal take extra argument

tsleep

pointer to process group held, (instead of process group id)

merge in vnodes

posix style job control - new process groups

4.3BSD release version

lint

lint; remove debug

lint cleanup

Add copyright